Two effective tricyclic platforms are reported for the installation of the two constituent sugars, L‐vancosamine and D‐angolosamine, in a regio‐ and stereoselective manner for the synthesis of the pluramycin class of bis‐C‐glycoside antitumor antibiotics. Two complementary protocols are now available that differ in the order in which the two sugar moieties are installed. Sc(OTf)3 was effective as the
Gurevich,A.I. et al., Journal of General Chemistry of the USSR, 1970, vol. 40, p. 363 - 366
作者:Gurevich,A.I. et al.
DOI:——
日期:——
US2841596
申请人:——
公开号:——
公开(公告)日:——
Synthesis of Structurally Simplified Aureolic Acid Aglycone-C-D-E Trisaccharide Analogues
作者:W. R. Roush、N. A. Powell、R. A. James
DOI:10.1071/ch01198
日期:——
Syntheses of aureolic acid analogues (5) and (6) with (2S)- and (2R)-acyloin stereochemistry, respectively, are described. The synthesis of (5) utilizes a `C + DE' glycosidation sequence, whereas analogue (6), with unnatural (2R)-acyloin stereochemistry, was synthesized by a sequence in which the entire C-D-E trisaccharide was introduced in a single step. While these syntheses provided sufficient quantities